Trolley-base.



'0.13. GIBRDING.. TROLLEY BASE. '-:grPLwTIoN FILED sim-s, 19111,033,166. Patented July 11112.

2' Sanna-s111131' 1.

C. E. GIERDING.

TROLLEY BASE` APPLIOATION FILED SBPT.G,1911.

2 SHEETS-SHEET 2,

INVENTOR Patented July 23, 1912.

UNITED sTATns PATENT orricn.

GHARLES E. GIERDING, OF NEWARK, NEW JERSEY.

TROLLEY-BASE.

Specification of Letters Patent.

Patented July 23, 19112.

pplication filed September 6, 1911. Serial No. 647,896.

VTo all whom it may concern vpart of this specification.

This invention relates to a trolley base Which is adapted to support atrolley arm so that when the trolley arm jumps, the consequent Ashockyon the base is minimized through an equalization brought about by themechanism of the base.

The improved trolley base is provided with a spring mechanism whichtendsto normally hold the trolley arm substantially upright or withitstrolley-wheel against thewire, but if released from the wire, the

trolley arm swings by reason of the pres sure of this spring mechanismso as to violently swing the trolley arm upward.

v1The improved trolley base provides for an abutment against which thetrolley arm is designed to swing, the abutment being constructed toyield and to minimize the. shock of the contact ot.' the trolley armwith the base and to prevent any breakage of parts or straining pf themechanism through too violent a Contact. The trolley base also comprisesa base of this type which is rotatable andy which easily rotates bothwhen the trolley arm'is pulled down by' its rope and the carriagethenswung.

The invention is illustrated in the accompanying drawings, in which- YFigure 1 is a side view of the improved trolley base, and. Fig. 2 is abottom view thereof with the base-plate shown in dotted outline. Fig. 3is a section on line 3, P, in Fig. l, and Fig. t is aside view ot' thetrolley base stripped ot' its springs and being brokenaway to show theconstruction ot' the parts, 'this` view also illust-rating the positionof the relieving mechanism when the trolley 'arm has engaged itand it ispushed to its limit ot' movement bythe trolley arm.

The base consists of a base-platey 10 on which is mounted a 'turret orsupport 11 rotating on a bolt 12 which is provided with,

a head 13. A locking. strip 14 is slid in a recess in the bottom of thebase-plate 10 and` is forked as at 15 to receive the bolt 12 as far asthe head 13. A screw 1G locks'tlie locking strip in place, and there isno opportunity for the bolt 12 to becomeloosened or accidentallywithdrawn. The locking strip when withdrawn permits the bolt and theturret to be lit'ted sufficiently to give access t0 a part ot' the,inside ofthe, turret.

and may be provided with any type of anlifriction device for taking upthe wear. The

base-plate 10 is provided lwith a circular track 1S, the use ot whichwill be described hereinafter.

At the front of the turret is mounted a4 pivot 19 on'which swings atrolley arm 20,`

the trolley arm being preferably forkedto embrace the bearing 21 andextend down on both sides ot' the turret and extend beyond the pivot,its projecting ends 2l having rods 22 extending therefrom.

are fitted with lipsI 2d at 'their ends, these lips preventing thesleeves 24 from slipping from the rods. The sleeves .'24 are integralwith anchors which anchors are seated in the narrowed ends 26 of thesprings QT, which springs, on the ends opposite the trolley arm, are.provided with duplicates of the anchors Q5, which are in turn providedwith eyes The eyes 2S fit over hooks 2S) of the frame 30, which frame ispreferably made T-shaped and tixcd on the bar 31. A screw-bolt passesthrough the bar 31 and fastens it to the tail :52E ofthe yoke 34. The

tail ot the yoke-is` provided with a roller Aturret 11 swings on thestud 1T ofthe base.

The rods i` 35 which runs on the track 1S and supports y the baseagainst excessive strain when the trolley arm is swung down and tlnnturned.

Lips 3G extend down nearly to the track 18 from the tail otl the yokeand move snow and sleet from the track when necessary.

The yoke ZH fits along both sides of the turret 1l and has its sidewalls arranged between the turret and thel two ends ofthe ion .t-tl...f, "fi trolley"arm.,l The Wallsfof the yoke are slotted as at 37,1theseyslots,receiriiigA the pivot- 19 and sliding thereon7 the slot limitingthe sliding movement ofthe yoke. The yoke has-a' head 38' which has aregulating screw ilther'ein, the rscrewwin turn acting against,

a Washer 40, which Washer has a stud 4l to Venter one end ofa spring 42;The spring 42' thuslabuts on the yoke at. one end, and on turret,havinga stud. ll'to enter' the spring and cooperate with the Astud' 41-to 'hold the springl-Qfalined'. 'Theyoke'is' providedl at the;sides'with -aliutinents 4Which are iin linewitli` the l:proje'otin'g'ends 21a of the trolley ariin the endsQlb of vthe' forked partof lthetrolley arm beingadapted to be' swung 'against-fthe aloutnients.` l'xfhis is desirable .when''tf-he',VV trolley arm is suddenly releasedand the'SPIEgS .27 eXertfall' their torce to ele'yatel-the trolley arm.Thel projecting ends fotitli'e 'trolley arm hit 'these iibiitinentsv'44'faiii'd"the yoke: is pushed oritfard. .The

' 'yoke as 's oonfas it inoyes,1 acts to c'oi'iipress the spring 42,ai'i'd'this spring thus acts as a bumper" and yieldi-ngly'- 'holds i theyoke against'Vy'io'lent' int-ion, thus )preventing breakiiigra'ndstraining of parts. Then the trolley a'rnrisV pulled down-to -diawt awayfrom the trolle`y-tvii e, or lwhen ith'is' in place with its Wheel onvthe Wire, the projecting ends Iofftlfie trolley/'farm :are out ofcontact with the",abutments ,44 Av.and the yoke .is

y pushed ,by spring 42 tothe forward position" shown inFig/l. At thesaine time the 27l are under tensionyvthis tension ,pulling 'I the 'ispring-holding arinsV1 or' frame 3Q tojforee: the yoke forward. Theroller 35 restsfoiithe track 18 .and assists in holding the ,basewWithout.st-rain. The track 18 is niadejwide enough to support theroller y,when"the"yoke is eitl'ieriin its forward or rea'rposition.: v.When the trolley arni swings toii'ivard.;.auft upright. positiomy itslprojecting en'dsfQlaifhave their extremities 2lb engage theqahutinentsi 44,1the yoke is startedl tor- .;fward against the action ofthe spring and thetrolley ar'in is halted easilyiand without Having thusdescribed my shockto the arm or the hase. y freeato rock and swing, itissoon held substantially steady hy thelfopposed actioncf Y fthe springs27 and 42a as Will be seen from- Fifgylr :The :degree ot-oppositionpresented bythe spring l2 to the trolley, arm, and the' piiessureffothespring is adjusted hy the'v acting to anchor the spring ineohanisiii7the I waaien lf the arm is yoke haring vmeans )ecting end ofthetrolleyarni when the arm escapes rroni the Wire, and a springnoropposition to the direction or Jforce exerted by thetrolley arni.` y

2. A trolley 1nase vcomprisingasupport, a

for engaging the prov inally resting on' the support and onv the L.yoke, said spring acting to force the yoke in trolley arni hiiigednearits end toY the'sup 'i port, a yoke sliding voni-he support, aspringmechanism for forcing the trolley arm upright,Y said spring mechanismbeing secured @to the yoke andthe trolley arm, means forv limiting thesliding'movementoi1 the yoke,

the yoke being adapted to lie engaged hyy'tlie trolley arm l'when the'trolley 'arm yis swung toward anv upright. position7 andaspring normallyhearing von` thev yokey and on thel y support for resisting'the swing ofthe trol" ley arm' toward an uprightpositioii. J 'f o n v ii trolleyhase comprising a base-plate.,

ae turret on the 'base-plate, -a trolleyariu swinging on the turret,alyoke sliding on the Y turret und projecting 'from its opposite ends, aspring mechanism Connected to one end of vthe yokey and to the trolleyarm 'and liaying a normal tendency tol oicethe trolley arm toward anupright position,",ineens` on the, .yoke tor engagingjtlie trolleylarinwhen the trol ley arm swings .tonfiard j an u'prightI position, andav'spiing hearing ontlieturret and. bearing on ttlief yoke, said spring"resisting the moijeinentof the yoke induced by the engagement of thetrollezyfalrinl with the lyoke as the trolley right-position. y f.; Y,

4. A trolley base *comprising abuse-plate,

arm swingsl toward an upa turret on the hase-plate: a yoke With'vsidewalls rflanking the- .turret, the. yoke having a `tail ononeend and ahead on the.y other end, a Vforkedtrolley arnifpivoted to `the sides ofthe turret, the yoke` having slots to vreceive the pivot. of thetiolleyarni antipermit the slidingV of the yoke, a spring mecha-- nisuiConnectedl tothe trolley .ariii andthe tail of the yoke, a springbetween theliead ofthe yoke yand thegturret, and 4abutine-its on theyoke against which the trolley arm ishfor'ced when itr swings toward anupright positioiny y 5. A` trolley lbase comprising av base-plate,

a turret Von the ibase-plate, a yoke having side Walls to flank theturret, theside walls terminating atoiie end in a head of the yoke andmerging on the .other side of the tui'- 'ret-into a tziilt a` forked`trolley arin pivoted to the turretihaying itsiorked ends extending downthe sides of the turret', abutineiits t on'the 'side Walls of-vtheylyoke .adapted to be engaged by the forked ends ofthe trolley arm`when it swings toward an upright position, spring mechanism connectedto the tail and "tof'the ends ofthe trolley arml for drawing the enfdstoward the abutment, andV hf spring mounted between the side Walls h'avehereunto set my hand this 2d day of and abuttinlg ondthe llllead'fo1 thelgfoke and September 1911. theturret tie si ewa so t e o ehavin y' "1 lT f slots throllgh which thepivot o? the trollegf E""GIERD*l\ G 5 arm'entends, the slots permitting the sliding Witnesses:

movemento' the yoke. J. RowLANU-Bowm- 'In testimony that I claim theforegoing, I J. C. PAINfifn;

